In an electrically neutral atom of any element, there are equal numbers of A) protons and neutrons.

B) electrons and protons.

C) electrons and neutrons.

D) atomic number and atomic mass.

Which statement correctly describes both gases and liquids?

Which ion has no electrons

At room temperature the electrical conductivity and the electron mobility for aluminum are 3.8 * 107 (Ω∙m) - 1 and 0.0012 m 2/V∙s, respectively. (a) Compute the number of free electrons per cubic meter for aluminum at room temperature.

Contrast the structures of ionic compounds and metals.

What happens to the pressure as we traveled down?

How many moles of neon (Ne, 20.179 g/mol) are in 68.4 grams of neon

A 50.00 mL sample of groundwater is titrated with 0.0300 M EDTA. Of 12.40 mL of EDTA is required to titrate the 50.00 mL sample, what is the hardness of the groundwater in molarity and in parts per million of CaCO 3 by mass

Why openness is important to the progress of science?

At a certain temperature the rate of this reaction is second order in NH4OH with a rate constant of 34.1 M^-1s^-1: Suppose a vessel contains NH4OH at a concentration of 0.100M.

If you go into the lab and dissolve 2.11 g of magnesium chloride in enough water to make 1500 ml of solution, what is the molarity of the resulting solution?